Keyshawn Johnson assesses the biggest X-factors for the upcoming NFL season. 0:00 Justin Fields or Robert Quinn: Who's the bigger X-factor for the Chicago Bears? 1:32 Why Zeke Elliott may come back better than ever this season for the Cowboys. 3:56 Keyshawn says Jordan Love is the undoubted X-factor for the Green Bay Packers if Aaron Rodgers leaves. 5:37 Is Henry Ruggs an X-factor for the Las Vegas Raiders? ✔️Subscribe to ESPN+ http://espnplus.com/youtube ✔️ Get the ESPN App: http://www.espn.com/espn/apps/espn ✔️Subscribe to ESPN on YouTube: http://es.pn/SUBSCRIBEtoYOUTUBE ✔️ Subscribe to NBA on ESPN on YouTube: http://bit.ly/SUBSCRIBEtoNBAonESPN ✔️ Watch ESPN on YouTube TV: http://es.pn/YouTubeTV